See also:

BMW Maintenance System
The maintenance system directs you to required maintenance measures and thereby supports you in maintaining road safety and the operational reliability of the vehicle. ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. ...

Display in the instrument cluster
The selected speed is displayed in the speedometer. ▷ Green: the system is actively braking the vehicle. ▷ Orange: the system is on standby. ...